UM3308 Datasheet, PDF (1/12 Pages) Union Semiconductor, Inc. – 8-Bit Bidirectional Voltage-Level Translator with Auto Direction sensing and ±15kV ESD Protection

UM3308
8-Bit Bidirectional Voltage-Level Translator with Auto Direction
sensing and ±15kV ESD Protection
UM3308 CSP20 2.7×2.4
General Description
UM3308 is 8-channel bidirectional voltage level translator with auto direction sensing and ±15kV
ESD protection. This 8-channel noninverting translator uses two separate configurable
power-supply rails. The A port is designed to track V_CCA. V_CCA accepts any supply voltage from
1.2V to 3.6V. The B port is designed to track V_CCB. V_CCB accepts any supply voltage from 1.65V
to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.2V,
1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. Both I/O ports are auto-sensing; thus, no direction
pin is required, making it ideal for data transfer between low-voltage ASICs/PLDs and higher
voltage systems.
The UM3308 operates at a guaranteed data rate of 20Mbps over the entire specified operating
voltage range. Within specific voltage domains, higher data rates are up to 100Mbps.
When the output-enable (OE) input is low, all outputs are placed in the high-impedance state. The
UM3308 is designed so that the OE input circuit is supplied by V_CCA.
To ensure the high-impedance state during power up or power down, OE should be tied to GND
through a pull down resistor; the minimum value of the resistor is determined by the
current-sourcing capability of the driver.
The UM3308 is 8-channel level translator available in CSP20 2.7×2.4 bump package.
Applications
Features
 Low-Voltage ASIC Level Translation
 Cell-Phone Cradles
 Portable POS Systems
 Portable Communication Devices
 Low-Cost Serial Interfaces
 Cell-Phones
 GPS
 Telecommunications Equipment
 1.2V to 3.6V on A Port and 1.65V to 5.5V
on B Port (V_CCA ≤V_CCB)
 V_CC Isolation Feature – If Either V_CC Input
is at GND, All Outputs are in the
High-Impedance State
 OE Input Circuit Referenced to V_CCA
 Low Power Consumption
 Latch-Up Performance Exceeds 100mA
 ±15kV ESD Protection on B Ports
Pin Configurations
(Bottom View)
Top View
(Top View)
XXX: Date Code
UM3308
CSP20 2.7×2.4
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http://www.union-ic.com Rev.08 Apr.2014
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